Reducing-mill.



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UNITED STATES Patented April 19, 1904.

HERMAN W. BECHT, OF CINCINNATI, OHIO.

REDUClNG-MILL.

. SPECIFICATION forming part of Letters Patent No. 757,433, dated April19,1904.

' Application filed May 2o, 190s. sesame' 157,897. (No model.)

To all whom it may concern: 4

Be itl known that I, HERMAN W. BECHT, a citizen of the United States,residing in the city of Cincinnati, in the county of Hamilton and Stateof Ohio, have invented certain new and useful Improvements inReducing-Mills; and I do declare the following to be a clear, full, andexact description thereof, attention being called to the accompanyingdrawings, with the reference-'figures marked thereon, which form also apart of this specification.

This invention relates to improvements in reducing-mills, the objectbeing to provide a mill for reducing and pnlverizing matter like spices,roots, herbs, granulated substances like sugar, nuts, and similarmaterials in general and used particularly in the drug and confectionerybusiness and where the most suitable motion to obtain a reduction is arubbing or grinding one and similar to one as is now attained by thehand-operated pestle and mortar.

The leading feature of my invention is therefore a construction as shownand described and whereby this rubbing motion is practically carried outfor the purpose of reducing substances of the kind indicated.

In the following specification, and particularly pointed out in theclaims at the end thereof, is found a full description of the invention,together with its operation, parts, and construction, which latter isalso illustrated in the accompanying drawings, in which- Figure 1 is aside view of my improved reducing-mill with parts .broken away. Fig. 2is a top view of the same. v Fig. 3 is an enlarged top view of theoperating parts, being the rubbers detached. Fig. 4 is a sectionaldetail View showing one of the rubbers in edge view.

In order to obtain the rubbing motion of the pestle for grinding thematerial down to the desired reduction, I provide one or more rubbers 7,which are pivotally secured so as to be free to rest during allpositions they assume during their motion against the bottom of thereceptacle which contains the material to be reduced. This receptacleconsists by preference of a bowl 8 of circular shape with a curvedbottom. vThe rubbers 7 two in this caseare each provided with a shank 9,the free end of each of which is pivotally attached to the lower end ofan arm 10. This lower end is broadened laterally on each side of thearm, as shown at 11, andthe Shanks of the rubbers are attached, asshown, on'opposite sides of the arm. However, this mannerof connectionneed not be carried out absolutely as to every detail described, themain essential being that the rubbers are free to follow the shape ofthe bottom of the bowl as they are dragged across the Vsame from oneside to the other by arm 10, as shown in dotted lines in Fig. 1, andthat while so dragged they are also free'to yield sufficiently topermit`the material to be ground to pass under them. This requires acapacity to yield upwardly to suit the thickness or grain of suchmaterial or layer of it and is by a support which permits motion in aplane substantially at right angles ito the inner surface of the bowlor, as

shown, in a vertical' direction-that is, up,

wardly. v

For moving arm 10 for the purpose'indicated I support the same pivotallybetween'its `ends,'as shown at 12, the rubbers being attached to oneend, while the moving power operates at the other end. This power may bederived from any suitable machine elements. As shown, I use aconnecting-rod 13, reciprocated by a crank 14 on a'shaft15. Rotation ofthe latter may be by direct means or by intervention of sprocket-wheels16 and 17 and a chain 18, sprocket-wheel 16 being mounted on a shaft 15and the other wheel being mounted on a shaft 19. In order to subject allparts of the contents of bowl 8 to the action of the rubbers, the bowlis rotated at a moderate speed about the center of its vertical axis andfor which purpose said bowl is accordingly mounted. In this case Ip'rovide a vertical shaft 21, upon the upper end of which the bowl ismounted and which shaft is supported in suitable bearings attached tothe general machine-frame. It is rotated by a set of bevel-wheels 22,one mounted on shaft 21 and the other on shaft 19, so that thedriving-power for rotating thebowland agitating the rubbers may bereceived at one initial driving-point, which may be either one of IOO`,the same as well as the operating parts.

shafts 15 or 19. In this case shaft 19 is considered to be thedriving-shaft, and the same is accordingly zrotated, which may be by apulley '23 or crank 24.

The supporting-point 12is at one of the upv per parts of the frame, andthis particular part is in shape of a beam 25, supported at both endsand havingfmidway of these latter a downwardly-extending projection 26,which constitutes the aforesaid point of attachment l2 for arm 10.

By connecting one end of beam 25 pivotally and the other detachablethe'same, with the rubbers on it, may be swungup, as shown in dottedlines in Fig. l, and turned over, so as to entirely clear -the bowl topermit cleaning As a pivot for such 4purpose I useshaft 15, and on whicharm 25 may swing, said shaft being supported in bearings 27 and 28.

The intensity of action of the rubbersis of ,course proportional totheir weight and may therefore be properly arranged by selecting thisarm is oscillated in a vertical plane with-` in the bowl and in amannerfto reciprocate the rubbers connected to its lower end in thereciprocated by the arm to which they are connected.

Y 2. In a reducing-mill, the combination of a general frame, an armforming a part of it and supported across the top of the same, a bowlbelow, means to rotate the same, rubbers to operate in conjunction withthe bowl, being normally in contact with the lower part of it, an armpivotally attached between its ends to the framelarm above mentioned andto the lower end of which the rubbers are connected, and means tooscillate this arm in a manner whereby the rubbers are dragged in astraight path back and forth over the lower part of the bowl and fromone side of the same to the other, the connection of the rubbers to thearms being pivotal so that their contactwith the bowl is a yielding one.I

8. In a reducing-mill, the combination ofa general frame, a shaftsupported on the upper part thereof, bearings for it, a framearmsupported across this frame it being with one of its, endspivotallyconnected to the shaft mentioned, a bowl supported below thisframearm, means to rotate it, an arm pivoted between its ends to theframe-arm mentioned and extending with its lower end into the bowl,.rubbers pivotally attached to its lower end, operative connectionbetween its upper endand the shaft mentioned whereby said arm isoscillated in a vertical plane and in a manner to cause the rubbers tobe dragged l HERMAN W. BECHT.'

Witnesses: i

' C. SPENGEIQ,

ALBERT A. MoEBUs.

